This work is a selectively annotated bibliography of research from areas of group therapy, group psychotherapy, group counseling, and psychodrama. The authors present a balanced sampling of empirical research with a wide range of research methods, analytic methods, and instruments so as to facilitate cross-fertilization of research efforts. The 1793 items, including 44 books, are presented within five age-group sections: children, adolescents, college students, adults, and the elderly.